Horrific CCTV footage shows the moment two teenage boys on an off-road motorbike slam into a schoolgirl while speeding down the pavement.

Jessica Chisnall was 15 when she was hit by an off-road bike which mounted the pavement as she walked home from school in St Helens, Merseyside, on January 13.

Merseyside Police has now released footage showing the moment Jessica was hit by the bike, which was ridden by two boys, aged 12 and 16.

The rider and passenger of the bike made off from the incident but were later arrested.

The 16-year-old - who had been given the bike as a reward for good achievement in school - was given a detention and training order and disqualified from driving for five years while the 12-year-old was given a youth referral order.